Gaya APA

Tyas, L, A, N. (2009). Management of environment-friendly inn in Ubud tourism resort . Yogyakarta: Graduate School Gadjah Mada University.

Gaya MLA

Tyas, Lintang, Ayu, Nugrahaning. "Management of environment-friendly inn in Ubud tourism resort". Yogyakarta: Graduate School Gadjah Mada University, 2009. BUKU.